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Event recognition from still images is of great importance for image understanding. However, compared with event recognition in videos, there are much fewer research works on event recognition in images. This paper addresses the issue of…

Computer Vision and Pattern Recognition · Computer Science 2015-05-05 Limin Wang , Zhe Wang , Wenbin Du , Yu Qiao

The video and action classification have extremely evolved by deep neural networks specially with two stream CNN using RGB and optical flow as inputs and they present outstanding performance in terms of video analysis. One of the…

Computer Vision and Pattern Recognition · Computer Science 2016-09-05 Ali Diba , Ali Mohammad Pazandeh , Luc Van Gool

Deep neural networks are representation learning techniques. During training, a deep net is capable of generating a descriptive language of unprecedented size and detail in machine learning. Extracting the descriptive language coded within…

Neural and Evolutionary Computing · Computer Science 2018-01-30 Dario Garcia-Gasulla , Ferran Parés , Armand Vilalta , Jonatan Moreno , Eduard Ayguadé , Jesús Labarta , Ulises Cortés , Toyotaro Suzumura

Many previous methods have showed the importance of considering semantically relevant objects for performing event recognition, yet none of the methods have exploited the power of deep convolutional neural networks to directly integrate…

Computer Vision and Pattern Recognition · Computer Science 2017-03-23 Sungmin Eum , Hyungtae Lee , Heesung Kwon , David Doermann

Detecting extreme events in large datasets is a major challenge in climate science research. Current algorithms for extreme event detection are build upon human expertise in defining events based on subjective thresholds of relevant…

Computer Vision and Pattern Recognition · Computer Science 2016-05-05 Yunjie Liu , Evan Racah , Prabhat , Joaquin Correa , Amir Khosrowshahi , David Lavers , Kenneth Kunkel , Michael Wehner , William Collins

Compared to other applications in computer vision, convolutional neural networks have under-performed on pedestrian detection. A breakthrough was made very recently by using sophisticated deep CNN models, with a number of hand-crafted…

Computer Vision and Pattern Recognition · Computer Science 2016-06-07 Qichang Hu , Peng Wang , Chunhua Shen , Anton van den Hengel , Fatih Porikli

We investigate the problem of representing an entire video using CNN features for human action recognition. Currently, limited by GPU memory, we have not been able to feed a whole video into CNN/RNNs for end-to-end learning. A common…

Computer Vision and Pattern Recognition · Computer Science 2017-01-31 Zhenzhong Lan , Yi Zhu , Alexander G. Hauptmann

Recent advances in event camera research emphasize processing data in its original sparse form, which allows the use of its unique features such as high temporal resolution, high dynamic range, low latency, and resistance to image blur. One…

Computer Vision and Pattern Recognition · Computer Science 2023-11-14 Kamil Jeziorek , Andrea Pinna , Tomasz Kryjak

Event cameras capture visual information with a high temporal resolution and a wide dynamic range. This enables capturing visual information at fine time granularities (e.g., microseconds) in rapidly changing environments. This makes event…

Robotics · Computer Science 2023-03-09 Sankeerth Durvasula , Yushi Guan , Nandita Vijaykumar

The success of recent deep convolutional neural networks (CNNs) depends on learning hidden representations that can summarize the important factors of variation behind the data. However, CNNs often criticized as being black boxes that lack…

Computer Vision and Pattern Recognition · Computer Science 2018-06-27 Bolei Zhou , David Bau , Aude Oliva , Antonio Torralba

Violence and abnormal behavior detection research have known an increase of interest in recent years, due mainly to a rise in crimes in large cities worldwide. In this work, we propose a deep learning architecture for violence detection…

Computer Vision and Pattern Recognition · Computer Science 2024-09-13 Abdarahmane Traoré , Moulay A. Akhloufi

Motivated by the success of data-driven convolutional neural networks (CNNs) in object recognition on static images, researchers are working hard towards developing CNN equivalents for learning video features. However, learning video…

Computer Vision and Pattern Recognition · Computer Science 2015-05-19 Zhenzhong Lan , Dezhong Yao , Ming Lin , Shoou-I Yu , Alexander Hauptmann

This work targets human action recognition in video. While recent methods typically represent actions by statistics of local video features, here we argue for the importance of a representation derived from human pose. To this end we…

Computer Vision and Pattern Recognition · Computer Science 2015-09-24 Guilhem Chéron , Ivan Laptev , Cordelia Schmid

Video processing and analysis have become an urgent task since a huge amount of videos (e.g., Youtube, Hulu) are uploaded online every day. The extraction of representative key frames from videos is very important in video processing and…

Computer Vision and Pattern Recognition · Computer Science 2022-11-15 Hao Tang , Lei Ding , Songsong Wu , Bin Ren , Nicu Sebe , Paolo Rota

The task of object segmentation in videos is usually accomplished by processing appearance and motion information separately using standard 2D convolutional networks, followed by a learned fusion of the two sources of information. On the…

Computer Vision and Pattern Recognition · Computer Science 2023-09-04 Sabarinath Mahadevan , Ali Athar , Aljoša Ošep , Sebastian Hennen , Laura Leal-Taixé , Bastian Leibe

We investigate video classification via a two-stream convolutional neural network (CNN) design that directly ingests information extracted from compressed video bitstreams. Our approach begins with the observation that all modern video…

Computer Vision and Pattern Recognition · Computer Science 2017-12-21 Aaron Chadha , Alhabib Abbas , Yiannis Andreopoulos

Scene understanding plays an important role in several high-level computer vision applications, such as autonomous vehicles, intelligent video surveillance, or robotics. However, too few solutions have been proposed for indoor/outdoor scene…

Computer Vision and Pattern Recognition · Computer Science 2024-07-23 Ayman Beghdadi , Azeddine Beghdadi , Mohib Ullah , Faouzi Alaya Cheikh , Malik Mallem

Event-based cameras are bio-inspired sensors that capture brightness change of every pixel in an asynchronous manner. Compared with frame-based sensors, event cameras have microsecond-level latency and high dynamic range, hence showing…

Computer Vision and Pattern Recognition · Computer Science 2023-03-20 Dongsheng Wang , Xu Jia , Yang Zhang , Xinyu Zhang , Yaoyuan Wang , Ziyang Zhang , Dong Wang , Huchuan Lu

Accurate pedestrian detection has a primary role in automotive safety: for example, by issuing warnings to the driver or acting actively on car's brakes, it helps decreasing the probability of injuries and human fatalities. In order to…

Computer Vision and Pattern Recognition · Computer Science 2018-08-09 Denis Tome' , Luca Bondi , Emanuele Plebani , Luca Baroffio , Danilo Pau , Stefano Tubaro

Traditional feature encoding scheme (e.g., Fisher vector) with local descriptors (e.g., SIFT) and recent convolutional neural networks (CNNs) are two classes of successful methods for image recognition. In this paper, we propose a hybrid…

Computer Vision and Pattern Recognition · Computer Science 2017-04-26 Zhe Wang , Limin Wang , Yali Wang , Bowen Zhang , Yu Qiao